I have a gramin gpsmap76Cx. I shared the android rooting just to share that I am somewhat technical.

I think I am making progress, but I need a bigger SD card. The one I have is only 2GB. How large of a card can I use and can I load more than one GMAPSUPP.IMG on an SD card so that I can have a marine map and a city navigator map?

no you cant, this is an IMG and then you cant see bluecharts in mapsource
It will require a UNL file to be viewed with a Garmin GPS.
As with all locked g2 & g2 Vision maps, it can still be viewed with HomePort without being unlocked and/or needing a UNL file.

[Only registered and activated users can see links. ][Only registered and activated users can see links. ]

[Only registered and activated users can see links. ]You have to navigate to get to the good.

There are three files in the original post. Each file has an IMG file inside. I would assume that I just select the one I need for my area or am I doing something wrong? I used IZarc to open the files. Opened, the files are all larger than 2GB.

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